Ramon Tortosa Navas Antonio Aceituno José Manuel de la Rosa Ángel Rodríguez-Vázquez Francisco V. Fernández A 12-bit@40MS/s Gm-C Cascade 3-2 Continuous-Time Sigma-Delta Modulator. 1-4 2007 conf/iscas/2007 ISCAS http://doi.ieeecomputersociety.org/10.1109/ISCAS.2007.378128 db/conf/iscas/iscas2007.html#NavasARRF07